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Multi-root Share of Single-Root I/O Virtualization (SR-IOV) Compliant PCI Express Device

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6 Author(s)
Suzuki, J. ; Syst. Platforms Res. Labs., NEC Corp., Kawasaki, Japan ; Hidaka, Y. ; Higuchi, J. ; Baba, T.
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We have achieved sharing a single-root I/O virtualization (SR-IOV) compliant PCI Express (PCIe) I/O device among multiple computers. A device share not only inside a single computer among virtual machines, but also among multiple computers attracts a great interest because it provides efficient utilization of computer resources. Because PCIe is originally a single-root system, realizing multi-root I/O virtualization is much more difficult than SR-IOV. We allocate virtual instances called VF of an SR-IOV-compliant I/O device to an individual computer by virtualizing IOV configuration and translating memory address of VF to that of the allocated computer. With the FPGA implementation, we have achieved sharing a commercially-available network interface card among three computers without modification in OS/driver and device itself. In addition, the performance reaches 99% of the device in the best case whereas the implementation is in the early stage, indicating this method provides not only MR sharing but high performance at the same time.

Published in:

High Performance Interconnects (HOTI), 2010 IEEE 18th Annual Symposium on

Date of Conference:

18-20 Aug. 2010

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